"Good girl. Breathe. You're doing so well for me."

You shifted your hips up, determined to hold a side plank as long as possible. You're getting better at this- stronger and more able to stay in all the positions your instructor desires.

You weren't quite sure when the goal of your classes moved from getting fitter to pleasing your new instructor but- right now it feels like nothing could be more important. Her praise sings through your body, giving you the energy to complete the final few seconds of the pose.

"Very good girl," she said. "Now take a moment to rest and we'll try something new."

You gratefully sit, enjoying the feeling of the fan's air on your bare skin. You're never quite sure how long these classes are- time seems to slow and stretch like taffy during them- but they always wear you out. At some point, the other, less dedicated students leave and go home but- you're so focused on your forms that you often don't realize when you and your instructor are finally alone.

You drink some water and shake out your arms, looking at the ground. This was one of the first things your instructor taught you during these private sessions- that you don't need to see to follow. Seeing too much would distract you and she needs you to be deeply, intensely mindful during class. Occasionally she'll even blindfold you, leaving only her voice to guide you through a lesson. It felt like following a light through the darkness.

You can sense your instructor's powerful presence as she stands over you. She's so close that you can even smell her. As one hand comes down to firmly pet your hair, you relax and catch your breath.

"Look at me," she commands.

Your eyes instantly go upwards to her smiling face

"I'm going to challenge you a bit today, ok?" she says. "Are you ready for that?"

For her, you were ready for anything. You nod, eagerly.

"Good girl. Take a deep breath and then move into a plank for me."

You comply, rolling over until your arms hold up your body with your ass in the air. This pose is hard but you have been working on it. You were getting stronger every day.

"Good," she said. "Stay still!" She pets down your back. When she reaches your hips, her hands go around them and she adjusts them upwards. You follow her lead, positioning yourself to her liking.

"Perfect," she responds. "So good for me".

She caresses your unmoving body in long, soothing strokes. You nod obediently, still looking at the floor in front of you. A bead of your sweat falls onto the mat. It's a strain to hold this pose but you're determined to meet her challenge.

Slowly, you notice her stroking hands starting to roam- going down your legs and around your ass. You long to push into the touch but- she wants you still. You sigh as they find a particularly sensitive place under your knees.

The arms under you start to shake.

Her hands move away. "Mmm! Nope! No don't do that," she scolds. "If you can't stay still, I'll have to stop! You don't want that, do you?"

You shake your head no and try not to whimper.

Her hands resume their intoxicating stroking. After a few moments, they finally reach your nipples.

You're still focused on the ground in front of you, whole body straining to hold up your weight.

The hands start circling and pinching. Then, one of those amazing hands snakes down to your pussy.

You moan loudly and involuntarily at the first touch, shattering the quiet of the room around you. You bite your cheek hard, trying to keep your hips from pushing into those amazing hands.

Somehow you stay still.

"Good girl," she says, rewarding you with her words and a slow, perfect rubbing. "If you can stay like this, I'll let you cum for me."

The rubs get faster as you swallow your moans and try to keep your body still. You've held this plank longer than you ever have before and your arms are aching. The pins and needles are coming in, telling you that they're getting numb.

The pain is perfectly counterbalanced by the pleasure her hand is sending through your body. You're SO CLOSE to orgasm now. You just need to hold on a bit longer.

You grit your teeth.

Your muscles tense up even more.

The hand keeps going, spinning you closer to the edge.

Just a few more moments

Muscles straining

Better and better, higher and higher

Hold a few moments more

Almost there.....

Your arms suddenly collapse under you, unable to hold your weight a second longer. You fall to the floor, sobbing out a breath.

Fortunately for both of you, it appears that she was able to move her hands right before you fell and crushed them.

Quickly, her hands move back to your shoulders, soothingly stroking your back as you come down. She sits beside you, holding your tired body carefully. You keep your head down and focus on the floor.

"That's ok," she says, gently. "That was a good effort. Very well done for me."

She gives your sweat-soaked hair more pets as you take a moment to settle. Then you feel her moving your hair so she can speak directly into your ear:

"We'll just have to try it again next week."